阅读说明：本技术 一种床箱锁 (Bed box lock ) 是由 吴海刚 于 2020-08-20 设计创作，主要内容包括：一种床箱锁,解决现有技术存在的体积大、结构复杂,占用空间大,故障率高,安装位置相对固定,使用灵活性差的问题。包括上部设置有锁固开口的连接壳体,其特征在于：连接壳体的锁固开口内设置有锁固卡环；连接壳体的内部转动设置有锁固卡钩,锁固卡钩的卡接部与锁固卡环在锁固开口处相互卡接；锁固卡钩的下部,设置有用于固定卡钩锁固位置的伸缩插柱。其设计合理,结构紧凑,占用床箱内部空间小,安装和使用的灵活性强,故障率低、便于维护,且加工成本低廉。(The utility model provides a bed case lock, solves that prior art exists bulky, the structure is complicated, and occupation space is big, and the fault rate is high, and the mounted position is relatively fixed, uses the poor problem of flexibility. Be provided with lock solid open-ended connection casing, its characterized in that including upper portion: a locking snap ring is arranged in the locking opening of the connecting shell; the locking clamping hook is rotatably arranged in the connecting shell, and the clamping part of the locking clamping hook and the locking clamping ring are mutually clamped at the locking opening; the lower part of the locking hook is provided with a telescopic inserting column for fixing the locking position of the hook. The bed box has the advantages of reasonable design, compact structure, small occupied space inside the bed box, strong flexibility in installation and use, low failure rate, convenience in maintenance and low processing cost.)

1. A bed box lock, includes connecting casing (1), its characterized in that: a locking opening (2) is formed in the upper portion of the connecting shell (1), and a locking clamping ring (4) is arranged in the locking opening (2); the connecting shell (1) is internally and rotatably provided with a locking hook (3), and the clamping part of the locking hook (3) and the locking snap ring (4) are mutually clamped at the locking opening (2); and the lower part of the locking hook (3) is also provided with a telescopic inserting column (5) for fixing the locking position of the locking hook (3).

2. The bed box lock as claimed in claim 1, wherein: the connecting shell (1) is composed of a shell main body (16), and bed box connecting convex edges (17) are respectively arranged on two sides of the shell main body (16); a shell inner cavity (7) for arranging the locking hook (3) is formed in the shell main body (16), and the locking opening (2) is formed in the upper part of the shell inner cavity (7); a hook installation convex shaft (8) is arranged in the inner cavity (7) of the shell and at the position of the side part of the locking opening (2).

3. The bed box lock as claimed in claim 2, wherein: the locking hook (3) is composed of a hook main body (23), a hook rotating insertion hole (24) is formed in the middle of one end of the hook main body (23), and a hook pushing spring pushing portion (25) is arranged below the hook rotating insertion hole (24) and at the end of one end of the hook main body (23); a clamp ring clamping groove (29) is formed in the upper portion of the other end of the clamp hook main body (23), and a clamp ring pressing contact portion (28) is arranged between the clamp ring clamping groove (29) and the end portion of the other end of the clamp hook main body (23); meanwhile, an inserting column clamping groove (26) is also formed below the clamping ring clamping groove (29) and the lower part of the clamping hook main body (23); the locking hook (3) is rotatably arranged on a hook mounting convex shaft (8) in the connecting shell (1) through a hook rotating insertion hole (24), and a hook rotating pushing spring (9) is arranged between a hook pushing spring pushing part (25) of the locking hook (3) and the inner side wall of the shell inner cavity (7) of the connecting shell (1).

4. A bed chest lock as claimed in claim 3 wherein: a hook rotation limiting column (21) is arranged in the shell inner cavity (7) of the connecting shell (1) and at the upper part of the other side of the locking opening (2) where the hook installation convex shaft (8) is not arranged; correspondingly, a rotation limiting contact part (27) is arranged on the end part of one end of the clamping hook main body (23) of the locking clamping hook (3) where the clamping ring pressing contact part (28) is arranged.

5. The bed box lock as claimed in claim 2, wherein: a closed side plate (6) is arranged on the front side of a shell inner cavity (7) of the connecting shell (1), the closed side plate (6) is composed of a side plate main body (30), and a locking opening (31) corresponding to the locking opening (2) is arranged on the upper part of the side plate main body (30); the lower part of the side plate main body (30) is provided with an inserting column telescopic cavity (32), the middle part of the inserting column telescopic cavity (32) is provided with an inserting column telescopic jack (33) which is vertically arranged, and correspondingly, the lower part of the connecting shell (1) and the position corresponding to the inserting column telescopic cavity (32) of the closed side plate (6) are provided with inserting column side baffles (20); and the middle part of the side plate main body (30) and the position corresponding to the lower side of the shell inner cavity (7) of the connecting shell (1) are provided with inner cavity lower side closing plates (36) which are transversely arranged.

6. The bed box lock of claim 5, wherein: a screw rod mounting hole (34) is formed in a side plate main body (30) of the closed side plate (6), and a screw rod connecting hole (22) is formed in the middle of the front end of a hook mounting convex shaft (8) in a shell inner cavity (7) of the connecting shell (1); the closed side plate (6) is connected with a screw connecting hole (22) at the front end of a hook mounting convex shaft (8) in the connecting shell (1) by a connecting screw (11) penetrating through a screw mounting hole (34).

7. The bed box lock of claim 5, wherein: and a positioning insertion hole (35) is also formed in the side plate main body (30) of the closed side plate (6).

8. The bed box lock of claim 5, wherein: the telescopic inserting column (5) is composed of an inserting column main body (37), a groove inserting part (38) is arranged at the upper end of the inserting column main body (37), and an inserting column driving part (40) is arranged at the lower end of the inserting column main body (37); the telescopic inserting column (5) is movably inserted into an inserting column telescopic inserting hole (33) of an inserting column telescopic cavity (32) of the closed side plate (6), and the inserting column main body (37) is positioned on one section inside the inserting column telescopic cavity (32) and is provided with a telescopic limit baffle (39); the outer side of an inserting column main body (37) between the lower side of the telescopic limit baffle (39) and the lower side wall inside an inserting column telescopic cavity (32) is further sleeved with an inserting column reset spring (10).

9. The bed box lock of claim 8, wherein: and a driving matching groove (41) is formed in an inserting column driving part (40) at the lower end of an inserting column main body (37) of the telescopic inserting column (5).

10. The bed box lock as claimed in claim 1, wherein: the locking clamping ring (4) is composed of a U-shaped clamping ring (12), a bed plate connecting plate (13) is arranged at the upper end of the U-shaped clamping ring (12), and a positioning hole (14) and a threaded connecting hole (15) are respectively formed in the bed plate connecting plate (13).

Technical Field

The invention belongs to the technical field of furniture, and particularly relates to a bed box lock which is compact in structure, small in occupied space, strong in use flexibility, low in failure rate, convenient to maintain and low in processing cost.

Background

The storage function of the bed box of the daily household bed is very practical, and the bed box with a common structure is very hard to open, so that the inside of the bed box is mostly provided with a pneumatic rod and a bed box locking mechanism for opening the bed box. However, the bed box locking mechanism with the existing structure has the disadvantages of large volume, complex structure, large occupied space in the bed box, high failure rate, relatively fixed installation position and poor use flexibility. In addition, the existing bed box locking mechanism has high processing cost and is not beneficial to wide popularization and use. There is a need for an improved locking mechanism for a bed box of the prior art.

Disclosure of Invention

Aiming at the problems, the invention provides the bed box lock which has the advantages of compact structure, small occupied space, strong use flexibility, low failure rate, convenient maintenance and low processing cost.

The technical scheme adopted by the invention is as follows: this bed case lock is including connecting the casing, its characterized in that: a locking opening is formed in the upper portion of the connecting shell, and a locking clamping ring is arranged in the locking opening; the connecting shell is internally and rotatably provided with a locking hook, and the clamping part of the locking hook and the locking clamp ring are mutually clamped at the locking opening; and the lower part of the locking hook is also provided with a telescopic inserting column for fixing the locking position of the locking hook.

The connecting shell is composed of a shell main body, and bed box connecting convex edges are respectively arranged on two sides of the shell main body; the shell body is internally provided with a shell inner cavity for arranging the locking hook, and the locking opening is arranged at the upper part of the shell inner cavity; and a hook mounting convex shaft is arranged in the inner cavity of the shell and at the position of the side part of the locking opening. The connecting shell is connected with the bed box side plates through the bed box connecting convex edges on the two sides, and the locking hook is rotatably arranged on the hook mounting convex shaft in the inner cavity of the shell.

The locking hook is composed of a hook main body, a hook rotating insertion hole is formed in the middle of one end of the hook main body, and a hook pushing spring pushing portion is arranged below the hook rotating insertion hole and at the end of one end of the hook main body; a clamping ring clamping groove is formed in the upper portion of the other end of the clamping hook main body, and a clamping ring pressing contact portion is arranged between the clamping ring clamping groove and the end portion of the other end of the clamping hook main body; meanwhile, an inserting column clamping groove is formed below the clamping ring clamping groove and the lower part of the clamping hook main body; the locking hook is rotatably arranged on a hook mounting convex shaft in the connecting shell through a hook rotating insertion hole, and a hook rotating pushing spring is arranged between a hook pushing spring pushing part of the locking hook and the inner side wall of the inner cavity of the connecting shell. The locking hook is rotatably connected to the hook mounting convex shaft inside the connecting shell through the hook rotating insertion hole, the locking snap ring at the locking opening is fixed through the snap ring clamping groove of the locking hook, and meanwhile, the locking position of the locking hook is fixed through the matched insertion of the telescopic insertion column and the insertion column clamping groove below the snap ring clamping groove and at the lower part of the locking hook. When the telescopic inserting column is moved out of the inserting column clamping groove, the clamping hook in a compressed state is used for rotating the pushing spring to push the pushing spring pushing part of the clamping hook of the locking clamping hook, and the clamping ring clamping groove of the locking clamping hook is driven to rotate upwards around the axis of the clamping hook mounting convex shaft, so that the locking of the locking clamping ring is released, and the movable bed plate on the upper side of the bed box is opened. When the movable bed plate is closed downwards by applying force, the locking clamping ring on the lower side of the movable bed plate presses the downward pressing contact part of the clamping ring of the locking clamping hook, so that the clamping ring clamping groove of the locking clamping hook rotates downwards around the axis of the clamping hook mounting convex shaft to lock the locking clamping ring, and the telescopic inserting column is inserted into the inserting column clamping groove again to fix the locking position.

The upper part of the other side of the locking opening, which is not provided with the hook mounting convex shaft, in the inner cavity of the shell of the connecting shell is provided with a hook rotation limiting column; correspondingly, the end part of one end of the clamping ring pressing contact part is arranged on the clamping hook main body of the locking clamping hook, and a rotation limiting contact part is arranged on the end part. The upward rotating position of the clamping ring clamping groove of the locking clamping hook is limited by the matched clamping of the rotating limiting contact part at the end part of the locking clamping hook and the clamping hook rotating limiting column in the inner cavity of the shell body of the connecting shell, and the downward pressing locking clamping ring can be effectively contacted with the downward pressing contact part of the clamping ring on the locking clamping hook when the movable bed board is closed.

A closed side plate is arranged on the front side of the inner cavity of the shell connected with the shell and consists of a side plate main body, and a locking opening corresponding to the locking opening is formed in the upper part of the side plate main body; the lower part of the side plate main body is provided with an inserting column telescopic cavity, the middle part of the inserting column telescopic cavity is provided with an inserting column telescopic jack which is vertically arranged, and correspondingly, an inserting column side baffle is arranged at the position corresponding to the inserting column telescopic cavity of the closed side plate and connected with the lower part of the shell; and the middle part of the side plate main body and the position corresponding to the lower side of the inner cavity of the shell connected with the shell are provided with inner cavity lower side closing plates which are transversely arranged. The front side of the inner cavity of the shell connected with the shell is sealed by the sealed side plate, and the lower side of the inner cavity of the shell connected with the shell is sealed by the sealed plate at the lower side of the inner cavity in the middle of the side plate main body of the sealed side plate.

A screw rod mounting hole is formed in the side plate main body of the closed side plate, and a screw rod connecting hole is formed in the middle of the front end of a hook mounting convex shaft in the inner cavity of the shell body of the connecting shell; the closed side plate is connected with a screw connecting hole at the front end of a hook mounting convex shaft in the connecting shell by a connecting screw penetrating through the screw mounting hole. The closed side plate is detachably arranged on the front side of the connecting shell by utilizing the connection of the connecting screw rod and the screw rod connecting hole at the front end of the hook mounting convex shaft.

And a positioning insertion hole is also formed in the side plate main body of the closed side plate. So that the closed side plate and the front side of the connecting shell are connected and positioned, and the installation is convenient.

The telescopic inserting column is composed of an inserting column main body, a groove inserting part is arranged at the upper end of the inserting column main body, and an inserting column driving part is arranged at the lower end of the inserting column main body; the telescopic inserting column is movably inserted into an inserting column telescopic inserting hole of an inserting column telescopic cavity of the closed side plate, and the inserting column main body is positioned on one section inside the inserting column telescopic cavity and is provided with a telescopic limit baffle; the post main part outside of inserting between flexible limit baffle downside and the inside lower lateral wall of inserting the flexible chamber of post still is equipped with and inserts post reset spring. The fixing and loosening of the locking position of the locking hook are realized by utilizing the reciprocating extension of the telescopic inserting column in the inserting column telescopic cavity of the closed side plate; and when the movable bed board is closed, the telescopic inserting column is upwards inserted into the inserting column clamping groove of the locking clamping hook by means of the reset elastic force of the inserting column reset spring, and the extending distance of the telescopic inserting column is limited by the telescopic limiting baffle.

And a driving matching groove is formed in the inserting column driving part at the lower end of the inserting column main body of the telescopic inserting column. The telescopic inserting column driving part is connected with various driving mechanisms by utilizing the driving matching groove at the lower end of the telescopic inserting column, so that the telescopic inserting column is driven conveniently.

The locking snap ring is composed of a U-shaped snap ring, a bed plate connecting plate is arranged at the upper end of the U-shaped snap ring, and a positioning hole and a threaded connecting hole are respectively formed in the bed plate connecting plate. The locking snap ring is positioned and connected to the lower side of the movable bed plate through a positioning hole in the bed plate connecting plate, and the locking snap ring is fixedly fixed on the movable bed plate through a connecting bolt penetrating through the threaded connecting hole.

The invention has the beneficial effects that: because the invention adopts the connecting shell the upper part of which is provided with the locking opening, the locking opening is internally provided with the locking snap ring; the locking clamping hook is rotatably arranged in the connecting shell, and the clamping part of the locking clamping hook and the locking clamping ring are mutually clamped at the locking opening; the lower part of the locking hook is provided with a telescopic inserting column for fixing the locking position of the hook, so the structure is reasonable in design, compact in structure, small in occupied space inside the bed box, high in flexibility in installation and use, low in failure rate, convenient to maintain and low in processing cost.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

Fig. 2 is a schematic view of an internal structure of fig. 1 after the closing side panel is removed (locked state of the bed case).

Fig. 3 is a schematic diagram of an exploded structure of fig. 1.

FIG. 4 is a schematic diagram of a locking ring of FIG. 3.

Fig. 5 is a schematic view of a structure of the connection housing of fig. 3.

Fig. 6 is a schematic structural view of the locking hook in fig. 3.

Fig. 7 is a schematic view of a closure panel of fig. 3.

Fig. 8 is a view from direction a of fig. 7.

Fig. 9 is a schematic view of a structure of the telescopic post of fig. 3.

Fig. 10 is a schematic view of the open state of the bed box in which the telescopic post in fig. 2 is retracted downward, the locking hook is rotated counterclockwise upward under the driving of the hook rotating push spring, and the locking of the locking clasp is released.

The sequence numbers in the figures illustrate: 1 connecting shell, 2 locking opening, 3 locking hook, 4 locking clasp, 5 telescopic inserted column, 6 closed side plate, 7 shell inner cavity, 8 hook mounting convex shaft, 9 hook rotating push spring, 10 inserted column reset spring, 11 connecting screw rod, 12U-shaped clasp, 13 bed board connecting plate, 14 positioning hole, 15 threaded connecting hole, 16 shell main body, 17 bed box connecting convex edge, 18 convex edge connecting hole, 19 hook push spring mounting rod, 20 inserted column side baffle, 21 hook rotating limit column, 22 screw rod connecting hole, 23 hook main body, 24 hook rotating plug hole, 25 hook push spring pushing part, 26 inserted column clamping groove, 27 rotating limit contact part, 28 clasp pressing contact part, 29 clasp clamping groove, 30 side plate main body, 31 locking opening, 32 inserted column telescopic cavity, 33 inserted column telescopic jack, 34 screw rod mounting hole, 35 positioning jack, 36 inner cavity lower side closed plate, 37 inserted column main body, 9 clasp clamping groove, 30 side plate main body, 31 locking opening, 32 locking opening, 33 inserted column telescopic jack, 34 screw rod, 38 groove insertion parts, 39 telescopic limit baffles, 40 insertion column driving parts and 41 driving matching grooves.

Detailed Description

The specific structure of the present invention will be described in detail with reference to FIGS. 1 to 10. The bed box lock comprises a connecting shell body 1 connected with the inner side of a bed box side plate, wherein the connecting shell body 1 is composed of a shell main body 16, bed box connecting convex edges 17 are respectively arranged on two sides of the shell main body 16, and a plurality of convex edge connecting holes 18 are arranged on the bed box connecting convex edges 17. The inside of the shell main body 16 of the connecting shell 1 is provided with a shell inner cavity 7 for arranging the locking hook 3, and the upper part of the shell inner cavity 7 is provided with a locking opening 2 for inserting the locking snap ring 4. A hook mounting convex shaft 8 is arranged at the middle part of the shell cavity 7 of the connecting shell 1 and at the position on the left side of the locking opening 2; further, the connecting case 1 is connected to the inner sides of the side plates of the bed case by bolts passing through the flange connecting holes 18 of the flange connecting flanges 17 of the bed cases on both sides.

The hook mounting convex shaft 8 inside the shell cavity 7 of the connecting shell 1 is rotatably provided with a locking hook 3, the locking hook 3 is composed of a hook main body 23, and the middle part of the left end of the hook main body 23 is provided with a hook rotating insertion hole 24 which is used for being matched and connected with the hook mounting convex shaft 8. A hook push spring pushing part 25 is arranged below the hook rotating insertion hole 24 and at the end part of the left end of the hook main body 23; according to the specific use requirement, the hook pushing spring pushing part 25 can adopt a gap structure connected with the end part of the hook rotating pushing spring 9. A clamp ring clamping groove 29 used for being clamped with the locking clamp ring 4 is formed in the upper portion of the right end of the clamp hook main body 23, and a clamp ring pressing contact portion 28 which is convenient for the locking clamp ring 4 to press down and reversely rotate the locking clamp hook 3 when the movable bed board on the upper side of the bed box is closed is arranged between the clamp ring clamping groove 29 and the end portion of the right end of the clamp hook main body 23. Meanwhile, a column clamping groove 26 for matching and clamping with the telescopic column 5 is further arranged below the clamping ring clamping groove 29 of the locking clamping hook 3 and at the right side position of the lower part of the clamping hook main body 23. A telescopic inserting column 5 for fixing the locking position of the locking hook 3 is arranged below the locking hook 3.

A locking clamping ring 4 which is used for being clamped with the clamping ring clamping groove 29 of the locking clamping hook 3 is arranged in the locking opening 2 at the upper part of the connecting shell 1. The locking clamping ring 4 is composed of a U-shaped clamping ring 12, and a bed plate connecting plate 13 is arranged at the upper end of the U-shaped clamping ring 12; the bed board connecting plate 13 is respectively provided with a positioning hole 14 and a threaded connecting hole 15 so as to connect the locking snap ring 4 to the lower side of the movable bed board in a positioning way through the positioning hole 14 on the bed board connecting plate 13, and the locking snap ring 4 is fixedly fixed on the movable bed board by using a connecting bolt penetrating through the threaded connecting hole 15. The upper part of the right side of the locking opening 2, which is not provided with the hook mounting convex shaft 8, inside the shell cavity 7 of the connecting shell 1 is also provided with a hook rotation limiting column 21; correspondingly, the end part of the hook main body 23 of the locking hook 3, which is arranged at the right end of the clip pressing contact part 28, is provided with a rotation limiting contact part 27; the upward rotating position of the clamp ring clamping groove 29 of the locking clamp hook 3 is mechanically limited by the matched clamping of the rotation limiting contact part 27 at the end part of the locking clamp hook 3 and the clamp hook rotation limiting column 21 in the shell inner cavity 7 of the connecting shell 1; and ensures that when the movable bed board is closed, the downward pressing locking clamping ring 4 can be effectively contacted with the clamping ring downward pressing contact part 28 on the locking clamping hook 3 to form downward locking rotation of the locking clamping hook 3.

The locking hook 3 is rotatably arranged on a hook mounting convex shaft 8 inside the shell inner cavity 7 of the connecting shell 1 through a hook rotating insertion hole 24; in addition, a hook rotating push spring 9 is arranged between the hook push spring pushing part 25 of the locking hook 3 and the inner side wall of the shell inner cavity 7 of the connecting shell 1; one end of the hook rotating push spring 9 is connected with a hook push spring installation rod 19 on the inner side wall of the shell cavity 7, and the other end of the hook rotating push spring 9 is connected with a hook push spring pushing part 25 of the locking hook 3. Therefore, the locking hook 3 is rotatably connected to the hook mounting convex shaft 8 inside the connecting shell 1 by utilizing the hook rotating insertion hole 24, and the locking snap ring 4 at the locking opening 2 is fixed by the snap ring clamping groove 29 of the locking hook 3; meanwhile, the locking position of the locking hook 3 is fixed by the matching and inserting of the inserting column clamping groove 26 below the clamping ring clamping groove 29 and at the lower part of the locking hook 3 and the telescopic inserting column 5. When the telescopic insert post 5 is moved out of the insert post clamping groove 26, the pushing elasticity of the hook rotating pushing spring 9 in a compressed state to the hook pushing spring pushing part 25 of the locking hook 3 drives the snap ring clamping groove 29 of the locking hook 3 to rotate upwards anticlockwise around the axis of the hook mounting convex shaft 8, so that the locking of the locking snap ring 4 is released (as shown in fig. 10), and the movable bed board on the upper side of the bed box is opened. Then, when the movable bed board is closed downwards by applying force, the locking clamping ring 4 on the lower side of the movable bed board presses the clamping ring pressing contact part 28 of the locking clamping hook 3, so that the clamping ring clamping groove 29 of the locking clamping hook 3 rotates downwards clockwise around the axis of the clamping hook mounting convex shaft 8 to lock the locking clamping ring 4, and the telescopic inserting column 5 is inserted into the inserting column clamping groove 26 again to fix the locking position.

A closed side plate 6 is detachably arranged on the front side of the shell inner cavity 7 of the connecting shell 1. The closed side plate 6 is composed of a side plate main body 30 which is vertically arranged, and the upper part of the side plate main body 30 is provided with a locking notch 31 which corresponds to the locking opening 2 on the connecting shell 1. The lower part of the side plate main body 30 is provided with an inserting column telescopic cavity 32 for arranging the telescopic inserting column 5, and the middle part of the inserting column telescopic cavity 32 is provided with an inserting column telescopic jack 33 which is vertically arranged; accordingly, a post-inserting side barrier 20 for closing the post-inserting telescopic cavity 32 is provided at a position corresponding to the post-inserting telescopic cavity 32 of the closing side plate 6, which connects the lower portion of the housing 1. An inner cavity lower side closing plate 36 which is transversely and horizontally arranged is arranged at the position corresponding to the lower side of the shell inner cavity 7 of the connecting shell 1 in the middle of the inner side of the side plate main body 30 of the closing side plate 6; the front side of the shell inner cavity 7 of the connecting shell 1 is sealed by the sealing side plate 6, and the lower side of the shell inner cavity 7 of the connecting shell 1 is sealed by the inner cavity lower side sealing plate 36 at the middle part of the inner side of the sealing side plate 6.

A screw rod mounting hole 34 is arranged on the side plate main body 30 of the closed side plate 6 at a position corresponding to the hook mounting convex shaft 8 inside the connecting shell 1; correspondingly, a screw rod connecting hole 22 is arranged in the middle of the front end of the hook mounting convex shaft 8 in the shell inner cavity 7 of the connecting shell 1. The closing side plate 6 is connected with a screw connecting hole 22 at the front end of a hook mounting convex shaft 8 in the connecting shell 1 by a connecting screw 11 penetrating through a screw mounting hole 34 on the closing side plate. Meanwhile, in order to facilitate the connection positioning and the convenient installation of the closed side plate 6 and the front side of the connecting shell 1, a positioning jack 35 which is used for being matched and spliced with the hook rotation limiting column 21 in the connecting shell 1 is further arranged on the side plate main body 30 of the closed side plate 6. Thus, the closure side plate 6 is detachably mounted on the front side of the coupling case 1 by the coupling of the coupling screw 11 and the screw coupling hole 22 at the front end of the hook mounting boss 8.

The telescopic inserting column 5 for fixing the locking position of the locking hook 3 consists of an inserting column main body 37, and the upper end of the inserting column main body 37 is provided with a groove inserting part 38 which is used for being inserted into the inserting column clamping groove 26 of the locking hook 3; the lower end of the post body 37 is provided with a post driving portion 40, the post driving portion 40 is provided with a driving matching groove 41 and a connecting threaded hole, so that the driving matching groove 41 and the connecting threaded hole at the lower end of the telescopic post 5 are utilized to facilitate the connection between the post driving portion 40 of the telescopic post 5 and various driving mechanisms (such as a foot-operated driving rod, a pulling rope and the like), and the telescopic post 5 is driven conveniently. The telescopic inserting column 5 is movably inserted into an inserting column telescopic inserting hole 33 of an inserting column telescopic cavity 32 of the closed side plate 6, and an inserting column main body 37 of the telescopic inserting column 5 is positioned at the upper part of one section of the inner part of the inserting column telescopic cavity 32 and is provided with a telescopic limit baffle 39; the outer side of the inserting column main body 37 between the lower side of the telescopic limit baffle 39 and the lower side wall inside the inserting column telescopic cavity 32 is also sleeved with an inserting column return spring 10. Further, the fixing and the releasing of the locking position of the locking hook 3 are realized by utilizing the reciprocating extension and retraction of the telescopic inserting column 5 in the inserting column telescopic cavity 32 of the closed side plate 6; when the movable bed board is closed, the telescopic inserting column 5 is upwards inserted into the inserting column clamping groove 26 of the locking clamping hook 3 by means of the resetting elasticity of the inserting column resetting spring 10, and the upwards extending distance of the telescopic inserting column 5 is limited by the telescopic limit baffle 39.

When the bed box lock is used, the connecting shell 1 is connected with the inner side of the bed box side plate through the bolt, and when the bed box is in a normal locking state, the locking clamping ring 4 on the lower side of the movable bed plate is clamped and fixed in the locking opening 2 by utilizing the clamping ring clamping groove 29 of the locking clamping hook 3 in the connecting shell 1. When the bed box needs to be opened, firstly, an operator drives the telescopic inserting column 5 to move out of the inserting column clamping groove 26 at the lower part of the locking hook 3 downwards, then, the pushing spring 9 is rotated by the hook in a compressed state to push the pushing spring pushing part 25 of the hook pushing spring of the locking hook 3, the clamping ring clamping groove 29 of the locking hook 3 rotates upwards anticlockwise around the axis of the hook mounting convex shaft 8, and then the locking of the locking clamping ring 4 is released (as shown in fig. 10); the bed box is then opened manually, either by means of a lifting mechanism (e.g. a gas strut, gas spring or lifter) provided on the movable bed plate or manually.

When the bed box needs to be closed, an operator applies force to press the movable bed plate downwards, so that the locking snap ring 4 on the lower side of the movable bed plate is utilized to press the snap ring pressing contact part 28 of the locking snap hook 3 (such as the locking snap hook 3 in the position shown in fig. 10) in the open state, the snap ring clamping groove 29 of the locking snap hook 3 rotates downwards clockwise around the axis of the snap hook mounting convex shaft 8, the locking snap ring 4 is locked, and the locking and closing of the bed box are completed. Meanwhile, in the process of closing the movable bed board, the telescopic inserting column 5 is upwards inserted back into the inserting column clamping groove 26 of the locking clamping hook 3 in the locking state (such as the locking clamping hook 3 in the position shown in fig. 2) by means of the resetting elasticity of the inserting column resetting spring 10 so as to fix the locking position of the locking clamping hook 3.